feat(amazonq): re-enable DefaultModuleDependenciesService (aws#5889)

- Re-enable `DefaultModuleDependenciesService` it was disabled due to lsp wasn't able to handle these large amount of request. 
- Adding a step to de-dup and merge request, this reduce the `apache/dubbo` repo events from 439 to 112
- Partition the event by 10 per seconds to control the event flow to flare, this is needed to prevent flare freezing

Author: liumofei-amazon

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/AmazonQLspService.kt

@@ -73,6 +73,7 @@ import software.aws.toolkits.core.utils.writeText
 import software.aws.toolkits.jetbrains.core.coroutines.ioDispatcher
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.artifacts.ArtifactManager
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.auth.DefaultAuthCredentialsService
+import software.aws.toolkits.jetbrains.services.amazonq.lsp.dependencies.DefaultModuleDependenciesService
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.encryption.JwtEncryptionManager
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.flareChat.AmazonQLspTypeAdapterFactory
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.flareChat.AwsExtendedInitializeResult
@@ -592,9 +593,9 @@ private class AmazonQServerInstance(private val project: Project, private val cs
                 WorkspaceServiceHandler(project, cs, lspInitResult).also {
                     Disposer.register(this, it)
                 }
-                // DefaultModuleDependenciesService(project, cs).also {
-                //    Disposer.register(this, it)
-                // }
+                DefaultModuleDependenciesService(project, cs).also {
+                    Disposer.register(this, it)
+                }
             }
         }
     }

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/dependencies/DefaultModuleDependenciesService.kt

@@ -9,6 +9,7 @@ import com.intellij.openapi.project.Project
 import com.intellij.openapi.roots.ModuleRootEvent
 import com.intellij.openapi.roots.ModuleRootListener
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.AmazonQLspService
 import software.aws.toolkits.jetbrains.services.amazonq.lsp.dependencies.ModuleDependencyProvider.Companion.EP_NAME
@@ -44,14 +45,34 @@ class DefaultModuleDependenciesService(
     }
 
     private fun syncAllModules() {
+        val paramsMap = mutableMapOf<Pair<String, String>, DidChangeDependencyPathsParams>()
+
         ModuleManager.getInstance(project).modules.forEach { module ->
             EP_NAME.forEachExtensionSafe {
                 if (it.isApplicable(module)) {
-                    didChangeDependencyPaths(it.createParams(module))
+                    val params = it.createParams(module)
+                    val key = params.moduleName to params.runtimeLanguage
+
+                    paramsMap.merge(key, params) { existing, new ->
+                        DidChangeDependencyPathsParams(
+                            moduleName = existing.moduleName,
+                            runtimeLanguage = existing.runtimeLanguage,
+                            paths = (existing.paths + new.paths).distinct(),
+                            includePatterns = (existing.includePatterns + new.includePatterns).distinct(),
+                            excludePatterns = (existing.excludePatterns + new.excludePatterns).distinct()
+                        )
+                    }
                     return@forEachExtensionSafe
                 }
             }
         }
+
+        paramsMap.values.chunked(10).forEachIndexed { index, chunk ->
+            cs.launch {
+                delay(index * 1000L)
+                chunk.forEach { didChangeDependencyPaths(it) }
+            }
+        }
     }
 
     override fun dispose() {

plugins/amazonq/shared/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/dependencies/DefaultModuleDependenciesServiceTest.kt

@@ -187,6 +187,56 @@ class DefaultModuleDependenciesServiceTest {
         verify(exactly = 2) { mockLanguageServer.didChangeDependencyPaths(params) }
     }
 
+    @Test
+    fun `test deduplication of same moduleName and runtimeLanguage`() = runTest {
+        // Arrange
+        val module1 = mockk<Module>()
+        val module2 = mockk<Module>()
+        val params1 = DidChangeDependencyPathsParams(
+            moduleName = "sameModule",
+            runtimeLanguage = "java",
+            paths = listOf("/path/to/dep1.jar"),
+            includePatterns = listOf("*.java"),
+            excludePatterns = listOf("test/**")
+        )
+        val params2 = DidChangeDependencyPathsParams(
+            moduleName = "sameModule",
+            runtimeLanguage = "java",
+            paths = listOf("/path/to/dep2.jar"),
+            includePatterns = listOf("*.class"),
+            excludePatterns = listOf("build/**")
+        )
+
+        every { mockModuleManager.modules } returns arrayOf(module1, module2)
+        every { mockDependencyProvider.isApplicable(any()) } returns true
+        every { mockDependencyProvider.createParams(module1) } returns params1
+        every { mockDependencyProvider.createParams(module2) } returns params2
+
+        prepDependencyProvider(
+            listOf(
+                Pair(module1, params1),
+                Pair(module2, params2)
+            )
+        )
+
+        sut = DefaultModuleDependenciesService(project, this)
+
+        advanceUntilIdle()
+
+        // Verify only one call with merged paths
+        verify(exactly = 1) {
+            mockLanguageServer.didChangeDependencyPaths(
+                match {
+                    it.moduleName == "sameModule" &&
+                        it.runtimeLanguage == "java" &&
+                        it.paths.containsAll(listOf("/path/to/dep1.jar", "/path/to/dep2.jar")) &&
+                        it.includePatterns.containsAll(listOf("*.java", "*.class")) &&
+                        it.excludePatterns.containsAll(listOf("test/**", "build/**"))
+                }
+            )
+        }
+    }
+
     private fun prepDependencyProvider(moduleParamPairs: List<Pair<Module, DidChangeDependencyPathsParams>>) {
         every { mockModuleManager.modules } returns moduleParamPairs.map { it.first }.toTypedArray()